Bluetooth: btintel: Fail setup on error

[ Upstream commit e22a3a9d4134d7e6351a2998771522e74bcc58da ]

Do not attempt to send any hci command to controller if *setup* function
fails.

Fixes: af395330 ("Bluetooth: btintel: Add Intel devcoredump support")
Signed-off-by: Kiran K <kiran.k@intel.com>
Signed-off-by: Luiz Augusto von Dentz <luiz.von.dentz@intel.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>